These drawings of the bones of the foot are so skilled that they appear in every book of Leonardo's anatomical work. The care with which he has shown, from several angles, the way the structure works and its relationship of
bone to bone are some of the best pieces of anatomical drawing ever. He has drawn the foot from underneath as well as from both sides and from above. He also shows it on the end of the leg and demonstrates how the two bones of
the lower half of the leg fit into the structure of the ankle. The notes describe exactly how the bones fit together.
There is, oddly, a drawing of the shoulder and its musculature in the middle of all the foot drawings. This is a puzzle: possibly these drawings were not done at the same time and Leonardo was reluctant to waste the paper with only one drawing.